CN202641405U - Braking energy recovery control system of blade electric vehicle based on dual clutch transmission (DCT) - Google Patents

Braking energy recovery control system of blade electric vehicle based on dual clutch transmission (DCT) Download PDF

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Publication number
CN202641405U
CN202641405U CN 201220270944 CN201220270944U CN202641405U CN 202641405 U CN202641405 U CN 202641405U CN 201220270944 CN201220270944 CN 201220270944 CN 201220270944 U CN201220270944 U CN 201220270944U CN 202641405 U CN202641405 U CN 202641405U
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CN
China
Prior art keywords
motor
dct
braking
brake
control
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CN 201220270944
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Chinese (zh)
Inventor
柯南极
张青平
魏跃远
曲婧瑶
张兆龙
朱波
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北京汽车新能源汽车有限公司
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Priority to CN 201220270944 priority Critical patent/CN202641405U/en
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Publication of CN202641405U publication Critical patent/CN202641405U/en

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Abstract

The utility model discloses a braking energy recovery control system of a blade electric vehicle based on DCT, and relates to the technical field of electric vehicles. The control system comprises a vehicle-mounted storage battery, a motor, a two-gear DCT automatic gear box, a vehicle speed sensor, a main cylinder pressure sensor, a vehicle controller, a battery management system, a motor controller, a gear box controller and a feedback type brake anti-lock braking system. The vehicle-mounted storage battery supplies power for the motor; a main shaft of the motor is connected with the DCT automatic gear box; the vehicle controller, the battery management system, the motor controller, the gear box controller, the feedback type brake anti-lock braking system, the vehicle speed sensor and the main cylinder pressure sensor perform information communication and instruction transmission through networks and hard wires. The braking energy recovery control system of the blade electric vehicle based on DCT improves the vehicle energy usage and increases driving ranges of vehicles.

Description

A kind of braking of battery electric vehicle energy recovery control system based on DCT
Technical field
The utility model relates to the electric vehicle engineering field, relates in particular to a kind of braking of battery electric vehicle energy recovery control system based on DCT.
Background technology
External pure electric automobile scheme is main mainly with single-stage speed reducing, realizes the speed-regulating function demand by motor fully, covers the power demand of the full operating mode of car load by the permanent torque of motor low speed and high speed constant horsepower characteristic.Yet there is gap in domestic electric machine because manufacturing technology etc., maximum speed of revolution is difficult to reach 10,000 and turns above, the dynamic property level that has limited pure electric automobile promotes, and the high efficiency region scope to motor is had higher requirement, and therefore adopts the single-stage speed reducing ratio to be difficult to obtain good dynamic property and economy.
Rare power drive system exploitation based on DCT (Dual Clutch Transmission refers to the double-clutch automatic speed-change device) in the pure electric automobile exploitation.Traditional DCT change speed gear box is because the design of many gears, and do not have the turbine transformer of AT Automatic Transmission, and driving efficiency is high, is conducive to the energy consumption of the power system of coupling is optimized design.But structure and the cost of the many gears of tradition DCT are higher than single reduction gear.By to carrying out simplified design based on traditional DCT change speed gear box, the Proper Match power drive system reduces maximum speed and grade climbing performance to the designing requirement of motor, and takes into account between the motor high efficient area, can improve simultaneously dynamic property and the economy of car load.
Be applied to pure electric automobile but mate lift-launch with motor, its applying working condition and gearshift control have certain difference, particularly will rationally utilize regenerated energy to improve the continual mileage of electronlmobil.
Summary of the invention
The purpose of this utility model is the pure power driven system based on existing DCT, carries out braking energy recovery control system and control policy exploitation based on DCT, improves energy utilization and the continual mileage of automobile.
In order to reach above purpose, the utility model discloses a kind of braking of battery electric vehicle energy recovery control system based on DCT, comprise: Vehicular accumulator cell, motor, two gear DCT Automatic Transmission, car speed sensor, master cylinder pressure sensor, entire car controller, battery management system, electric machine controller, gearbox control, the feed-back type anti-blocking brake system, Vehicular accumulator cell connects motor and powers to motor, the main shaft of motor is connected entire car controller with the DCT Automatic Transmission, battery management system, electric machine controller, gearbox control, the feed-back type anti-blocking brake system, car speed sensor, master cylinder pressure sensor is connected with rigid line by network and carries out information communication and instruction and send.
Further, as a kind of preferred, described each network is the CAN bus.
Further, as a kind of preferred, described feed-back type anti-blocking brake system possesses the function of conventional hydraulic brake system, realize conventional brake and traditional abs braking, in addition, by increasing control cock, according to instruction adjustable brake line pressure, coordinate conventional brake and motor regenerative braking power.
A kind of braking of battery electric vehicle energy recycling and control method based on DCT comprises the steps:
Step 1: entire car controller receives the speed-slackening signal of brake pedal, Acceleration Signal, master cylinder pressure signal, vehicle speed signal and the anti-blocking brake system status signal of acceleration pedal;
Step 2: entire car controller is resolved driver intention according to brake pedal signal and master cylinder pressure signal, calculates target braking force, makes a strategic decision according to state and the car load speed of a motor vehicle state of current anti-blocking brake system, whether carries out regenerative brake control; When speed-slackening signal is zero and acceleration pedal signal non-zero, perhaps the anti-blocking brake system state is for starting, and perhaps SOC 〉=90% does not enter the regenerative brake pattern; When speed-slackening signal is that non-zero or acceleration pedal signal are zero, and battery SOC<90%, if the speed of a motor vehicle greater than 10km/h and less than 100km/h, enters the regenerative brake pattern; When speed-slackening signal is that non-zero or acceleration pedal signal are zero, and battery SOC<90%, if the speed of a motor vehicle less than 10km/h or greater than 100km/h, does not enter the regenerative brake pattern;
Step 3: if enter the regenerative brake pattern, entire car controller and gearbox control communicate, and control shift clutch pressure is constant, keep DCT Automatic Transmission current shift constant, do not carry out self shifter control, guarantee whole process power failure-free; Gearbox control sends the gear information of current DCT Automatic Transmission to entire car controller, entire car controller calculates the regenerative braking moment that motor can provide according to maximum charging current, battery terminal voltage, motor speed, DCT Automatic Transmission gear that current battery allows; When the end of regenerative brake pattern, gearbox control control change speed gear box gear changes to a gear;
Step 4: if regenerative braking moment greater than target braking force, then braking force is all provided by motor braking, control motor be in generating state; If regenerative brake power is during less than target braking force, then the regenerative braking moment of motor can not satisfy current demand braking force, and the residue braking requirement sends to by feed-back type anti-blocking brake system valve body regulates line pressure, is provided by the mechanical friction braking force;
Step 5: entire car controller calculates the residue machine made power demand that obtains according to motor braking power and target braking, residue braking force and trailing wheel can provide braking to compare, according to the front and back wheel braking relations of distribution, calculate the braking force of residue brakig force distribution on trailing wheel;
Step 6: entire car controller carries out braking deceleration and calculates according to the speed of a motor vehicle that gathers, with the target requirement braking-force ratio, if far below the car load braking requirement, think that motor braking lost efficacy, by the control and regulation of feed-back type anti-blocking brake system valve body, all adopt mechanical braking.
The utility model beneficial effect, because for adopting two grades of DCT Automatic Transmission, communicate by entire car controller and gearbox control, guarantee the change speed gear box power failure-free, and keep current shifting state constant, do not carry out self shifter control, reclaim finish after the control of gear return, can reach the performances such as the good gradual sensation of car load brakig force distribution, brake pedal, the braking energy percent recovery, braking safety, have simple in structure, cost is low, the easy characteristics such as realization of control.
Description of drawings
When considered in conjunction with the accompanying drawings, by the following detailed description of reference, can more completely understand better the utility model and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, consist of a part of the present utility model, illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of to improper restriction of the present utility model, wherein:
Fig. 1 is the braking of battery electric vehicle energy recovery control system block diagram based on DCT;
Fig. 2 is the braking of battery electric vehicle energy recycling and control method diagram of circuit based on DCT;
Fig. 3 is that the DCT automatic transmission controller is judged braking energy feedback model process figure.
The specific embodiment
Referring to figs. 1 through Fig. 3 embodiment of the present utility model is described.
For above-mentioned purpose, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in Figure 1, a kind of braking of battery electric vehicle energy recovery control system based on DCT, comprise: Vehicular accumulator cell 1, motor 2, two gear DCT Automatic Transmission 3, car speed sensor 4, master cylinder pressure sensor 5, entire car controller 6, battery management system 7, electric machine controller 8, gearbox control 9, feed-back type anti-blocking brake system 10, Vehicular accumulator cell 1 connects motor 2 and powers to motor 2, motor 2 and DCT Automatic Transmission 3 are mechanical connections, entire car controller 6, battery management system 7, electric machine controller 8, gearbox control 9, feed-back type anti-blocking brake system 10, car speed sensor 4, master cylinder pressure sensor 5 carries out information communication by network and rigid line and instruction sends.Each network is the CAN bus.The feed-back type anti-blocking brake system possesses the function of conventional hydraulic brake system, realizes conventional brake and traditional abs braking, in addition, by increasing control cock, according to instruction adjustable brake line pressure, coordinates conventional brake and motor regenerative braking power.
As shown in Figure 2, a kind of braking of battery electric vehicle energy recycling and control method based on DCT comprises the steps:
S1, step 1: entire car controller receives the speed-slackening signal of brake pedal, Acceleration Signal, master cylinder pressure signal, vehicle speed signal and the anti-blocking brake system status signal of acceleration pedal;
S2, step 2:S21, entire car controller are resolved driver intention according to brake pedal signal and master cylinder pressure signal; S22, calculating target braking force; S23, make a strategic decision according to state and the car load speed of a motor vehicle state of current anti-blocking brake system, whether carry out regenerative brake control; When speed-slackening signal is zero and acceleration pedal signal non-zero, perhaps the anti-blocking brake system state is for starting, and perhaps SOC 〉=90% does not enter the regenerative brake pattern; When speed-slackening signal is that non-zero or acceleration pedal signal are zero, and battery SOC<90%, if the speed of a motor vehicle greater than 10km/h and less than 100km/h, enters the regenerative brake pattern; When speed-slackening signal is that non-zero or acceleration pedal signal are zero, and battery SOC<90%, if the speed of a motor vehicle less than 10km/h or greater than 100km/h, does not enter the regenerative brake pattern;
If S3, step 3:S31 enter the regenerative brake pattern, entire car controller and gearbox control communicate, and control shift clutch pressure is constant, keep DCT Automatic Transmission current shift constant, do not carry out self shifter control, guarantee whole process power failure-free; Gearbox control sends the gear information of current DCT Automatic Transmission to entire car controller, maximum charging current, battery terminal voltage, motor speed, DCT Automatic Transmission gear that entire car controller allows according to current battery, calculate the regenerative braking moment that motor can provide at S32; When the end of regenerative brake pattern, gearbox control control change speed gear box gear changes to a gear;
S4, step 4:S41, judge regenerative braking moment and target braking force size, if the S42 regenerative braking moment greater than target braking force, then braking force is all provided by motor braking, the control motor is in generating state; If S43 regenerative brake power is during less than target braking force, then the regenerative braking moment of motor can not satisfy current demand braking force, the residue braking requirement sends to by feed-back type anti-blocking brake system valve body regulates line pressure, is provided by the mechanical friction braking force;
S5, step 5: entire car controller calculates the residue machine made power demand that obtains according to motor braking power and target braking, residue braking force and trailing wheel can provide braking to compare, according to the front and back wheel braking relations of distribution, calculate the braking force of residue brakig force distribution on trailing wheel;
S6, step 6:S63, entire car controller are according to the speed of a motor vehicle that gathers, carrying out braking deceleration calculates, with the target requirement braking-force ratio, if far below the car load braking requirement, think that motor braking lost efficacy, by feed-back type anti-blocking brake system valve body control and regulation, S61, do not carry out regenerative brake control, S62, all adopt mechanical braking.
The method of calculating of regenerative braking moment is as follows: if 10km/h<speed of a motor vehicle<100km/h, electric braking force is then controlled motor regenerative brake torque T=demand lock torque/current DCT change speed gear box transmitting ratio/base ratio greater than the demand braking force; If 10km/h<speed of a motor vehicle<100km/h, electric braking force, are then controlled motor regenerative brake torque T=motor maximum braking moment/current DCT change speed gear box transmitting ratio/base ratio less than the demand braking force; Calculate the unmet demand lock torque, judge according to unmet demand braking force size, by front-wheel, trailing wheel or single rear wheel provide, and send to EABS valve body adjustable brake line pressure; If 10km/h<speed of a motor vehicle<100km/h, and acceleration pedal signal and brake pedal signal are zero, detect current battery status, control motor regenerative brake torque carries out sliding brake function control with constant 15Nm, when detecting the speed of a motor vehicle<15km/h, the calculated relationship of control motor regenerative brake torque=-3 * speed of a motor vehicle+30 smoothly withdraws from control, as the speed of a motor vehicle most 10km/h that descends, it is 0 that braking energy reclaims controlling torque, all withdraws from.
Described regenerative brake masterpiece is used for front-wheel.
As shown in Figure 3, be the detailed description of step 3.
As mentioned above, embodiment of the present utility model is explained, but as long as not breaking away from fact inventive point of the present utility model and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation also all is included within the protection domain of the present utility model.

Claims (3)

1. braking of battery electric vehicle energy recovery control system based on DCT, it is characterized in that, comprise: Vehicular accumulator cell, motor, two gear DCT Automatic Transmission, car speed sensor, master cylinder pressure sensor, entire car controller, battery management system, electric machine controller, gearbox control, the feed-back type anti-blocking brake system, Vehicular accumulator cell connects motor and powers to motor, the main shaft of motor is connected entire car controller with the DCT Automatic Transmission, battery management system, electric machine controller, gearbox control, the feed-back type anti-blocking brake system, car speed sensor, master cylinder pressure sensor is connected with rigid line by network and carries out information communication and instruction and send.
2. a kind of braking of battery electric vehicle energy recovery control system based on DCT according to claim 1, it is characterized in that: described each network is the CAN bus.
3. a kind of braking of battery electric vehicle energy recovery control system based on DCT according to claim 1 and 2, it is characterized in that, described feed-back type anti-blocking brake system possesses the function of conventional hydraulic brake system, realize conventional brake and traditional abs braking, in addition, by increasing control cock, according to instruction adjustable brake line pressure, coordinate conventional brake and motor regenerative braking power.
CN 201220270944 2012-06-08 2012-06-08 Braking energy recovery control system of blade electric vehicle based on dual clutch transmission (DCT) CN202641405U (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102717714A (en) * 2012-06-08 2012-10-10 北京汽车新能源汽车有限公司 Pure electric vehicle braking energy recovery control system and method based on DCT (Data Communication Terminal)
CN104002686A (en) * 2014-06-13 2014-08-27 上海振华重工(集团)股份有限公司 Braking system and method for container straddle carrier
CN104192022A (en) * 2014-09-16 2014-12-10 中投仙能科技(苏州)有限公司 Comprehensive electromobile control system
EP3100898A4 (en) * 2014-01-30 2017-03-01 BYD Company Limited Vehicle and braking feedback control method thereof
US9849771B2 (en) 2015-01-16 2017-12-26 Byd Company Limited Transmission unit, power transmission system and vehicle comprising the same
US9874266B2 (en) 2014-09-10 2018-01-23 Byd Company Limited Power transmission system and vehicle comprising the same
US9889734B2 (en) 2015-01-16 2018-02-13 Byd Company Limited Power transmission system and vehicle comprising the same
US9889733B2 (en) 2015-01-16 2018-02-13 Byd Company Limited Power transmission system and vehicle comprising the same
US9919699B2 (en) 2014-01-30 2018-03-20 Byd Company Limited Vehicle and method for controlling synchronizer of the same
US9944165B2 (en) 2014-01-30 2018-04-17 Byd Company Limited Power transmission system for vehicle and vehicle comprising the same
US10166973B2 (en) 2014-10-20 2019-01-01 Byd Company Limited Vehicle and shifting control method and power transmission system thereof
US10166853B2 (en) 2015-01-16 2019-01-01 Byd Company Limited Transmission unit, power transmission system and vehicle comprising the same
US10670123B2 (en) 2014-01-30 2020-06-02 Byd Company Limited Power transmission system for vehicle and vehicle comprising the same

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102717714A (en) * 2012-06-08 2012-10-10 北京汽车新能源汽车有限公司 Pure electric vehicle braking energy recovery control system and method based on DCT (Data Communication Terminal)
US10232839B2 (en) 2014-01-30 2019-03-19 Byd Company Limited Vehicle and braking feedback control method for the same
US9944165B2 (en) 2014-01-30 2018-04-17 Byd Company Limited Power transmission system for vehicle and vehicle comprising the same
EP3100898A4 (en) * 2014-01-30 2017-03-01 BYD Company Limited Vehicle and braking feedback control method thereof
US9919699B2 (en) 2014-01-30 2018-03-20 Byd Company Limited Vehicle and method for controlling synchronizer of the same
US10670123B2 (en) 2014-01-30 2020-06-02 Byd Company Limited Power transmission system for vehicle and vehicle comprising the same
CN104002686A (en) * 2014-06-13 2014-08-27 上海振华重工(集团)股份有限公司 Braking system and method for container straddle carrier
US9874266B2 (en) 2014-09-10 2018-01-23 Byd Company Limited Power transmission system and vehicle comprising the same
CN104192022A (en) * 2014-09-16 2014-12-10 中投仙能科技(苏州)有限公司 Comprehensive electromobile control system
US10166973B2 (en) 2014-10-20 2019-01-01 Byd Company Limited Vehicle and shifting control method and power transmission system thereof
US9849771B2 (en) 2015-01-16 2017-12-26 Byd Company Limited Transmission unit, power transmission system and vehicle comprising the same
US10166853B2 (en) 2015-01-16 2019-01-01 Byd Company Limited Transmission unit, power transmission system and vehicle comprising the same
US9889734B2 (en) 2015-01-16 2018-02-13 Byd Company Limited Power transmission system and vehicle comprising the same
US9889733B2 (en) 2015-01-16 2018-02-13 Byd Company Limited Power transmission system and vehicle comprising the same

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C56 Change in the name or address of the patentee
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Address after: 102606 Beijing City Economic Development Zone, Daxing District Caiyu mining and Road No. 1

Patentee after: Beijing new-energy automobile Company Limited by Shares

Address before: 102606 Beijing City Economic Development Zone, Daxing District Caiyu mining and Road No. 1

Patentee before: Beijing Auto New Energy Auto Co., Ltd.